HearthStone Quality Home Heating Products Inc | Tucson Model #8700 |
RESTRICTION PLATE
The restriction plate is used to control the draft of the heater. Controlling the draft also changes the aesthetics of the flame. The restriction plate has eight settings, one (1) being the lowest and eight (8) being the highest. For a fast moving flame with lots of action, use a low setting. For a slow, lazy flame, a high setting should be used. See Figure 11 for instructions on how to adjust the restriction plate settings.
RESTRICTION PLATE POSITION
A vent restriction plate is available for the appliance to adjust the flow rate of exhaust gases. This insures proper flames for the wide variety of vent configurations and efficiency. The restriction plate consists of a rotating shutter below the starter section of pipe and an adjustment plate with index holes used to hold the shutter in a fixed
position. Depending on the vent configuration, you may be required to adjust the restriction plate position. Refer to pages 21 – 22 for positioning of the restriction plate.
ADJUSTMENT TO RESTRICTION PLATE
Remove the log set before adjusting restriction plate by following the log set removal on page 29. Make sure the unit is cool before touching any part of the firebox and log set. Remove the exhaust baffle by removing the one screw in the center of the baffle (refer to Figure 10). The baffle will fall out once the screw is removed. Be careful not to drop the baffle on the burner tube or burner tube holder. Once the baffle is set aside, check the restriction plate screw location. There are eight locations that the restriction plate can be positioned. (refer to Venting Configuration – Figures 14 – 16 for recommended restriction plate positions)
(refer to Figure 11 for proper adjustment plate ndexi location) ‘A’ in Figure 11 shows the locating screw that determines the position of the plate.
NOTE: These positions are based on lab results and can have some variance.
Remove the screw and position the restriction plate in the desired location. Fasten the screw into the proper hole and tighten. Reinstall the exhaust baffle by setting the back edge of the baffle into the baffle clip attached to the back wall of the firebox. Then push the baffle against the heat exchanger and reinstall the fasten bolt. Reinstall the log set and ember strip as described in the log set installation procedure on page 28.
Figure 10: Baffle Removal
Figure 11 : Restriction Plate Adjustments
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